Water sensor for detecting water in gas oil filters

A water sensor for detecting water in gas oil filters, comprising:

• a first electrode and a second electrode;
• a first earth connection for earthing the first electrode;
• a second earth connection for earthing the second electrode;
• a first switch arranged in the first earth connection;
• a second switch arranged in the second earth connection;
• a first current connection for injecting a first current into the first electrode;
• a second current connection for injecting a second current into the second electrode;
• and
• a current-generating circuit connected to the first electrode and to the second electrode by means of the first current connection and the second current connection respectively;
• wherein the current-generating circuit is designed to inject the first current into the first electrode and the second current into the second electrode, the first current and the second current being the same.